clc;
syms x;
f(x)=sin(x)/(x^2+4*x+3);
f1=diff(f);
pretty(f1)
ezplot(f,[0,5]),
hold on;
ezplot(f1,[0,5])

f4=diff(f,x,4);
latex(f4)

tic,
diff(f,x,100);
toc